Nozzle and personal care spraying device

Abstract

The utility model provides a nozzle and a personal care spraying device, and the nozzle comprises a spraying rod part which is internally provided with a first flow channel; the spray head part is connected with the spray rod part, the spray head part is provided with a second flow channel, and the second flow channel is communicated with the first flow channel; the number of the second flow channels is at least two, and the cross section area of the second flow channels is smaller than that of the first flow channels. According to the nozzle, multiple water columns can be sprayed out at the same time. Although the washing area of each water column is limited, the multiple water columns are sprayed out at the same time, so that the washing area of the whole nozzle can be obviously increased. In this way, a user does not need to move the personal care spraying device during flushing, or only needs to move the personal care spraying device slightly. In this way, the user can save or reduce the time taken to move the care spraying device, and therefore the flushing efficiency of the personal care spraying device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning, and in particular to a nozzle and a personal care spray device. Background Art

[0002] Since there are gaps between adjacent teeth, food residues are easily left in the gaps. Therefore, the related art proposes a personal care spray device, which can spray water columns to rinse the gaps when working.

[0003] However, since the flushing area of ​​the water column is limited and the gap between teeth has a certain height, the user needs to move the personal care spray device when flushing so that the water column can sweep the entire gap between teeth. Therefore, the flushing efficiency is relatively low.

[0004] How to improve the flushing efficiency of personal care spray devices is a question worth considering. Utility Model Content

[0005] The present application provides a nozzle and a personal care spray device, aiming to improve the flushing efficiency of the personal care spray device.

[0006] The specific technical solutions are as follows:

[0007] In a first aspect, the present application provides a nozzle, the nozzle comprising:

[0008] a spray bar portion, wherein a first flow channel is disposed inside the spray bar portion; and

[0009] A nozzle head, the nozzle head is connected to the spray bar, the nozzle head is provided with a second flow channel, and the second flow channel is communicated with the first flow channel;

[0010] There are at least two second flow channels, and the cross-sectional area of ​​the second flow channels is smaller than the cross-sectional area of ​​the first flow channels.

[0011] The nozzle in the embodiment of the present application, wherein the nozzle head is provided with at least two second flow channels, and since each second flow channel can construct a water column, the nozzle can spray multiple water columns at the same time. When the user rinses the gap between teeth, at least two water columns can be used to rinse the same gap between teeth at the same time. Although the rinsing area of ​​each water column is limited, multiple water columns are sprayed at the same time, which significantly increases the rinsing area of ​​the entire nozzle. In this way, the user does not need to move the personal care spray device when rinsing, or can move the personal care spray device slightly. In other words, the user can save or reduce the time spent on moving the care spray device, thereby improving the rinsing efficiency of the personal care spray device.

[0012] In addition, the nozzle head is provided with at least two second flow channels, so that the nozzle can spray out multiple water columns at the same time. Compared with the method in the prior art that the nozzle only sprays out one water column, the water pressure can be dispersed, so that the impact force of each water column is appropriately weakened. In this way, it can avoid the discomfort of the user caused by excessive impact force of the water column during flushing, and avoid damaging the user's gums during flushing.

[0013] In some embodiments, the length of the second flow channel is greater than or equal to 0.1 mm and less than or equal to 3 mm. Limiting the length of the second flow channel to 0.1 mm to 3 mm can make the water column have a better convergence, so that each water column maintains a good cleaning power.

[0014] In some embodiments, at least two of the second flow channels are symmetrically arranged. The water jets from the two symmetrical second flow channels have the same flushing force, so that the user does not feel a difference in flushing when using the personal care spray device, which is conducive to improving the user experience.

[0015] In some embodiments, at least two of the second flow channels have different lengths. The second flow channels of different lengths have different water outlet pressures, so that the flushing forces of the water columns sprayed from the corresponding second flow channels can be different to meet the use requirements of some users.

[0016] In some embodiments, at least two of the second flow channels have different cross-sectional areas. By making the cross-sectional areas of the second flow channels different, the flushing force of the sprayed water column can be different to meet the needs of users with tooth sensitivity, swollen gums and other problems.

[0017] In some embodiments, the extending direction of the second flow channel is arranged at an angle to the central axis of the spray head, so as to construct different flushing effects to meet the use requirements of different users.

[0018] In some embodiments, the distance between the end of the second flow channel away from the first flow channel and the central axis is smaller than the distance between the end of the second flow channel close to the first flow channel and the central axis. The water outlet of the second flow channel is closer to the central axis of the nozzle head than the water inlet, which makes the water column sprayed from the second flow channel tend to converge toward the center. In this way, the flushing range constructed by all the water columns is relatively small, which is suitable for users with relatively small teeth.

[0019] In some embodiments, the extension lines of at least two of the second flow channels intersect at a first position;

[0020] The distance between the end of the second flow channel away from the first flow channel and the first position in the extension direction of the central axis is greater than or equal to 0.1 mm and less than or equal to 10 mm. In this embodiment, the distance from the intersection of the extension lines of at least two second flow channels to the water outlet of the second flow channel is set to be greater than or equal to 0.1 mm and less than or equal to 10 mm, so that the water column can be prevented from intersecting before reaching the tooth gap. This is because if the water column intersects before reaching the tooth gap, it will affect the overall flushing area of ​​the nozzle.

[0021] In some embodiments, the distance between the end of the second flow channel away from the first flow channel and the central axis is greater than the distance between the end of the second flow channel close to the first flow channel and the central axis. The water outlet of the second flow channel is farther away from the central axis of the nozzle head than the water inlet, which makes the water column sprayed from the second flow channel more divergent, so that the flushing range constructed by all the water columns can be relatively large, which is suitable for users with relatively large teeth.

[0022] In some embodiments, the extension direction of one of the second flow channels forms a first angle with the central axis of the nozzle head, and the extension direction of another of the second flow channels forms a second angle with the central axis of the nozzle head, and the first angle is not equal to the second angle. This arrangement makes the water columns sprayed by the two second flow channels have different flushing forces, so that the use needs of users with problems such as sensitive teeth and swollen and painful gums can be met.

[0023] In some embodiments, all the second flow channels are arranged at intervals along the first direction, and the first direction is perpendicular to the central axis of the nozzle head. In this way, the nozzle can simultaneously spray multiple water columns arranged at intervals along the first direction, and the user can make the arrangement direction of the water columns parallel to the height direction of the tooth gap. In this way, multiple water columns can be used to achieve full coverage of the height of the tooth gap, thereby significantly saving the time spent on moving the care spray device, thereby more effectively improving the flushing efficiency.

[0024] In some embodiments, the first direction is parallel to the length direction of the nozzle head. This arrangement is conducive to the user to quickly adjust the arrangement direction of the water column so that the arrangement direction of the water column is parallel to the height direction of the tooth gap.

[0025] In some embodiments, the spray bar portion includes a first section and a second section connected to each other, an angle is formed between the second section and the first section, and the first direction is parallel to a virtual plane defined by a central axis of the first section and a central axis of the second section. The spray bar portion includes a first section and a second section, and an angle is formed between the second section and the first section, so that when a user holds the personal care spray device, the second section can be roughly perpendicular to the tooth surface without raising the arm, thereby reducing the arm raising height and not easily causing fatigue. On this basis, the first direction is parallel to a virtual plane defined by a central axis of the first section and a central axis of the second section. In this way, it is convenient for the user to quickly adjust the arrangement direction of the water column, so that the arrangement direction of the water column is parallel to the height direction of the tooth gap.

[0026] In some embodiments, the inner wall of the second flow channel includes a plane portion and a curved portion, and both ends of the curved portion are respectively connected to the plane portion, so that the cross-sectional shape of the second flow channel is "D"-shaped;

[0027] The planar portions of two of the second flow channels are close to each other and parallel to each other.

[0028] In this way, the two second flow channels each spray out a water column, and at the same time a thin water film will be formed between the two water columns. The water column rinses the gaps between the teeth, and the water film cleans the gaps between the teeth. Through the cooperation of the water column and the water film, the overall cleaning effect can be improved.

[0029] In some embodiments, the distance L0 between the two plane portions of the second flow channels is greater than or equal to 0.2 mm and less than or equal to 2 mm. This is conducive to forming a stable water film without affecting the overall flushing area of ​​the nozzle, and can also ensure that the two water columns can act on the tooth gap at the same time.

[0030] In some embodiments, the radius R0 of the arc surface is greater than or equal to 0.2 mm and less than or equal to 0.7 mm, so that the rapidity of the water column and the concentration of the water flow can be moderate, and both the user's comfort and the cleaning effect can be taken into account.

[0031] In some embodiments, the maximum distance L1 between the arcuate portions of two second flow channels satisfies:

[0032] L1≥L0+2*R0;

[0033] Wherein, L0 is the distance between the two planar portions of the second flow channels, and R0 is the radius of the arc portion.

[0034] Such an arrangement is conducive to making the water column sprayed from the second flow channel have a stable shape, thereby maintaining a good flushing ability.

[0035] In some embodiments, the first flow channel includes a first sub-segment and a second sub-segment that are interconnected, and the second sub-segment is located between the first sub-segment and the second flow channel;

[0036] The first subsection is a straight section, and the second subsection is a tapered section.

[0037] In this embodiment, the second subsection is constructed as a conical section, so that the water flow can be accelerated when flowing through the second subsection. The accelerated water flow is ejected through the second flow channel, which can make the water column have better flushing force, thereby helping to ensure the flushing effect.

[0038] In some embodiments, the cone angle of the second sub-segment is greater than or equal to 15° and less than or equal to 45°. When the cone angle of the second sub-segment is greater than or equal to 15° and less than or equal to 45°, the flushing force of the water column sprayed from the second flow channel can be moderate, which will neither cause the problem of insufficient flushing force nor cause the user to feel uncomfortable due to excessive flushing force.

[0039] In some embodiments, the length of the second subsection is greater than or equal to 1 mm and less than or equal to 10 mm. The length of the second subsection needs to be greater than or equal to 1 mm and less than or equal to 10 mm, so that the flushing force of the water column can be within the expected appropriate range and the control accuracy of the flushing force of the water column can be improved.

[0040] In some embodiments, the material of the spray head is soft rubber. Since soft rubber is easy to deform, the shape of the spray head will change under the action of water flow, and the spray direction of the water column will also change.

[0041] In some embodiments, a communication cavity is provided between adjacent second flow channels, so that adjacent second flow channels are connected to each other in the first direction;

[0042] The size of the communication cavity along the second direction is smaller than the size of the second flow channel along the second direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to the central axis of the spray head.

[0043] In this embodiment, a connecting cavity is provided between adjacent second flow channels, so that the adjacent second flow channels are connected to each other along the first direction. With such a configuration, a stable water film can be formed between the two water columns while the two second flow channels each spray out a water column. The water column can rinse the gap between the teeth, and the water film can clean the gap between the teeth. The cooperation of the water column and the water film can improve the overall cleaning effect. In addition, the water film formed by providing a connecting cavity between the two second flow channels can be relatively thick, and the water film is also more stable and not easy to break.

[0044] In some embodiments, the inner wall surface of the second flow channel is an arc surface, so that the cross-sectional shape of the second flow channel is a "D" shape. This is conducive to forming a stable water column from the water sprayed from the second flow channel and forming a stable water film between two adjacent water columns.

[0045] In some embodiments, the length of the connecting cavity along the second direction is less than 2 times the radius of the arc surface. This arrangement can ensure that the thickness of the water film is significantly smaller than the diameter of the water column, that is, to avoid excessive water flow converging at the water film, thereby ensuring that the water column has a good flushing force, and the water film only provides an auxiliary cleaning effect.

[0046] In some embodiments, the length of the connecting cavity along the first direction is greater than or equal to 0.2 mm and less than or equal to 2 mm. In this embodiment, the length of the connecting cavity along the first direction is in the range of 0.2 mm to 2 mm, which can achieve a better cleaning effect without affecting the overall flushing area of ​​the nozzle.

[0047] In a first aspect, the present application provides a personal care spray device, the personal care spray device comprising:

[0048] Host; and

[0049] In the nozzle of any of the above embodiments, one end of the spray bar portion away from the spray head portion is connected to the main machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of a nozzle in an embodiment of the present application;

[0051] Figure 2 is a schematic top view of a nozzle in an embodiment of the present application;

[0052] Figure 3 for Figure 2 Schematic diagram of the AA section in;

[0053] Figure 4 for Figure 3 A partial enlarged schematic diagram of the structure shown;

[0054] Figure 5 for Figure 2 Schematic diagram of the BB section in;

[0055] Figure 6 for Figure 5 A partial enlarged schematic diagram of the structure shown;

[0056] Figure 7 is a schematic top view of a nozzle in another embodiment of the present application;

[0057] Figure 8is a schematic diagram of the nozzle in the embodiment of the present application when spraying water;

[0058] Fig. 9 A schematic diagram of a spray boom portion in an embodiment of the present application.

[0059] Description of reference numerals:

[0060] 10. Nozzle;

[0061] 100, spray bar portion; 101, first section; 102, second section; 110, first flow channel; 111, first subsection; 112, second subsection;

[0062] 200, nozzle head; 210, second flow channel; 211, plane portion; 212, arc portion; 220, communication cavity;

[0063] 301. Water column; 302. Water film. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0065] In the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0069] Since there are gaps between adjacent teeth, food residues are easily left in the gaps. Therefore, the related art proposes a personal care spray device, which can spray a water column when working to rinse the gaps. However, since the flushing area of ​​the water column is limited and the gaps have a certain height, the user needs to move the personal care spray device when flushing so that the water column can sweep the entire gap. Therefore, the flushing efficiency is relatively low. How to improve the flushing efficiency of the personal care spray device is a problem worth considering.

[0070] Based on this, an embodiment of the present application provides a nozzle and a personal care spray device having the nozzle, aiming to improve the flushing efficiency of the personal care spray device.

[0071] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the nozzle 10 in the embodiment of the first aspect of the present application includes a spray bar portion 100 and a spray head portion 200, wherein the spray bar portion 100 is provided with a first flow channel 110, the spray head portion 200 is connected to the spray bar portion 100, and the spray head portion 200 is provided with a second flow channel 210, which is connected to the first flow channel 110. There are at least two second flow channels 210, and the cross-sectional area of ​​the second flow channel 210 is smaller than the cross-sectional area of ​​the first flow channel 110.

[0072] The nozzle 10 can be used in a personal care spray device, which can include a main unit, which includes a water tank and a liquid pump. The liquid pump can extract water from the water tank and transport the water to the nozzle 10. The water entering the nozzle 10 first passes through the first flow channel 110 of the spray bar 100, and then passes through the second flow channel 210 of the spray head 200 to form a water column 301. The cross-sectional area of ​​the second flow channel 210 is smaller than the cross-sectional area of ​​the first flow channel 110, so that the water sprayed from the nozzle 10 can maintain a certain flushing force. It can be understood that each second flow channel 210 corresponds to a water column 301.

[0073] In the nozzle 10 of the embodiment of the present application, the nozzle head 200 is provided with at least two second flow channels 210. Since each second flow channel 210 can construct a water column 301 (refer to Figure 8 ), therefore, the nozzle 10 can spray multiple water columns 301 at the same time. When the user rinses the gap between teeth, at least two water columns 301 can be used to rinse the same gap between teeth at the same time. Although the rinsing area of ​​each water column 301 is limited, multiple water columns 301 are sprayed at the same time, which significantly increases the rinsing area of ​​the entire nozzle 10. In this way, the user does not need to move the personal care spray device when rinsing, or only needs to move the personal care spray device slightly. In other words, the user can save or reduce the time spent on moving the care spray device, thereby improving the rinsing efficiency of the personal care spray device.

[0074] In addition, the nozzle head 200 is provided with at least two second flow channels 210, so that the nozzle 10 can spray out multiple water columns 301 at the same time. Compared with the method in the prior art that the nozzle 10 only sprays out one water column 301, the water pressure can be dispersed, so that the impact force of each water column 301 is appropriately weakened. In this way, it is possible to avoid the discomfort of the user caused by excessive impact force of the water column 301 during flushing, and to avoid damaging the user's gums during flushing.

[0075] In some embodiments, the length of the second flow channel 210 is greater than or equal to 0.1 mm and less than or equal to 3 mm. Exemplarily, the length of the second flow channel 210 can be 0.1 mm, 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. The length of the second flow channel 210 should not be too long, otherwise it will affect the degree of convergence of the water column 301, thereby causing the cleaning power of a single water column 301 to decrease. After a large number of experimental verifications, limiting the length of the second flow channel 210 to 0.1 mm to 3 mm can make the water column 301 have a better convergence, so that each water column 301 maintains a better cleaning power.

[0076] In some embodiments, at least two of all the second flow channels 210 are symmetrically arranged. That is, all the second flow channels 210 of the nozzle head 200 include one or more symmetrical groups, each of which includes two second flow channels 210 that are symmetrical to each other. The two symmetrically arranged second flow channels 210 have the same length, the same cross-sectional shape, the same cross-sectional size, etc.

[0077] Such an arrangement enables the water columns 301 sprayed out from the two second flow channels 210 having a symmetrical relationship to have the same flushing force, so that the user will not feel a difference in flushing when using the personal care spray device, thereby helping to improve the user experience.

[0078] In some embodiments, the lengths of at least two of all the second flow channels 210 are not equal. For some users, it may be necessary for the water columns 301 sprayed from different second flow channels 210 to have different flushing forces. For example, some users have sensitive teeth, and some users have swollen or painful gums or are experiencing swollen and painful gums. The root area of ​​these customers will be more sensitive to the flushing force of the water column 301, and once the flushing force is large, it will cause discomfort. In response to this situation, if different water columns 301 can have different flushing forces, then the water column 301 with relatively weak flushing force can be placed close to the root area, and the water column 301 with stronger flushing force can be placed close to the end of the tooth. In this way, the discomfort at the root area can be alleviated, and it is also beneficial for areas other than the root area to obtain a better cleaning effect.

[0079] In this embodiment, at least two of the second flow channels 210 are of unequal lengths, and the second flow channels 210 of unequal lengths have different water outlet pressures. In this way, the flushing forces of the water columns 301 sprayed from the corresponding second flow channels 210 can be different to meet the usage requirements of some users.

[0080] Furthermore, the length of one of the second flow channels 210 is greater than or equal to 1.5 times the length of the other second flow channel 210. For two second flow channels 210 of unequal lengths, if the difference in length between the two second flow channels 210 is too small, the difference in flushing force of the water columns 301 sprayed from the two second flow channels 210 will be less obvious, and thus, it will be difficult to effectively alleviate the discomfort at the root of the teeth. Therefore, in this embodiment, among the two second flow channels 210 of unequal lengths, the length of one is greater than or equal to 1.5 times the length of the other, and thus, the water columns 301 sprayed from the two second flow channels 210 can have a more obvious difference in flushing force, thereby effectively alleviating the discomfort at the root of the teeth.

[0081] In some embodiments, the cross-sectional areas of at least two of the second flow channels 210 are not equal. The second flow channels 210 with unequal cross-sectional areas also have different water outlet pressures, so the flushing forces of the ejected water column 301 are different. In other words, the flushing forces of the ejected water column 301 can also be differentiated by making the cross-sectional areas of the second flow channels 210 different, so as to meet the needs of users with problems such as sensitive teeth and swollen and painful gums.

[0082] In some embodiments, the extension direction of the second flow channel 210 is arranged at an angle to the central axis of the spray head 200. This is conducive to constructing different flushing effects to meet the use requirements of different users.

[0083] For example, in one embodiment, the distance between the end of the second flow channel 210 away from the first flow channel 110 and the central axis of the nozzle head 200 is smaller than the distance between the end of the second flow channel 210 close to the first flow channel 110 and the central axis of the nozzle head 200. It can be understood that the end of the second flow channel 210 away from the first flow channel 110 is the water outlet, and the end of the second flow channel 210 close to the first flow channel 110 is the water inlet. In this embodiment, the water outlet of the second flow channel 210 is closer to the central axis of the nozzle head 200 than the water inlet, which makes the water column 301 sprayed from the second flow channel 210 have a tendency to converge toward the center, so that the flushing range jointly constructed by all the water columns 301 is relatively small, which is suitable for users with relatively small tooth heights.

[0084] For example, in another embodiment, the distance between the end of the second flow channel 210 away from the first flow channel 110 and the central axis is greater than the distance between the end of the second flow channel 210 close to the first flow channel 110 and the central axis. In other words, the water outlet of the second flow channel 210 is farther away from the central axis of the nozzle head 200 than the water inlet, which makes the water column 301 sprayed from the second flow channel 210 more divergent, so that the flushing range jointly constructed by all the water columns 301 can be relatively large, which is suitable for users with relatively large teeth.

[0085] Further, based on the situation that the distance between the end of the second flow channel 210 away from the first flow channel 110 and the central axis of the nozzle head 200 is less than the distance between the end of the second flow channel 210 close to the first flow channel 110 and the central axis of the nozzle head 200. It can also be further defined that the extension lines of at least two second flow channels 210 intersect at the first position, and the distance between the end of the second flow channel 210 away from the first flow channel 110 and the first position in the extension direction of the central axis is greater than or equal to 0.1mm, and less than or equal to 10mm. Exemplarily, the distance between the end of the second flow channel 210 away from the first flow channel 110 and the first position in the extension direction of the central axis can be 0.1mm, 0.5mm, 1mm, 3mm, 5mm, 8mm, 10mm, etc.

[0086] That is to say, the distance from the intersection of the extension lines of at least two second flow channels 210 to the water outlet end of the second flow channel 210 is greater than or equal to 0.1 mm and less than or equal to 10 mm. Usually, the end of the nozzle 10 is also provided with an abutment portion, and when flushing, the abutment portion is used to abut against the tooth surface of the tooth, so as to facilitate the positioning of the nozzle 10 during the flushing process. The setting of the abutment portion makes the distance between the water outlet end of the second flow channel 210 and the tooth gap at least 0.1 mm. Therefore, in this embodiment, the distance from the intersection of the extension lines of at least two second flow channels 210 to the water outlet end of the second flow channel 210 is set to be greater than or equal to 0.1 mm and less than or equal to 10 mm, so that the water column 301 can be prevented from intersecting before reaching the tooth gap. This is because if the water column 301 intersects before reaching the tooth gap, it will affect the overall flushing area of ​​the nozzle 10.

[0087] In some embodiments, the extension direction of one of the second flow channels 210 forms a first angle with the central axis of the spray head 200, and the extension direction of the other second flow channel 210 forms a second angle with the central axis of the spray head 200, and the first angle is not equal to the second angle. This arrangement makes the water columns 301 sprayed by the two second flow channels 210 have different flushing forces, so that the use needs of users with problems such as sensitive teeth and swollen and painful gums can be met.

[0088] In some embodiments, all the second flow channels 210 are arranged at intervals along the first direction, and the first direction is perpendicular to the central axis of the nozzle head 200. In this way, the nozzle 10 can simultaneously spray multiple water columns 301 arranged at intervals along the first direction, and the user can make the arrangement direction of the water columns 301 parallel to the height direction of the tooth gap. In this way, the height of the tooth gap can be fully covered by multiple water columns 301, which can significantly save the time spent on moving the care spray device, thereby more effectively improving the flushing efficiency.

[0089] In one embodiment, the first direction is parallel to the length direction of the shower head 200 .

[0090] Please refer to Figure 2 ,Depend on Figure 2 It can be seen that the nozzle head 200 is generally elliptical, so the nozzle head 200 can determine the length direction and the width direction. Taking the nozzle head 200 adopting an elliptical shape as an example, the major axis direction of the ellipse is the length direction of the nozzle head 200, and the minor axis direction of the ellipse is the width direction of the nozzle head 200.

[0091] In this embodiment, the first direction is parallel to the length direction of the nozzle head 200. This configuration is conducive to the user to quickly adjust the arrangement direction of the water column 301 so that the arrangement direction of the water column 301 is parallel to the height direction of the tooth gap.

[0092] In one embodiment, Fig. 9 As shown, the spray rod portion 100 includes a first section 101 and a second section 102 connected to each other, an angle is formed between the second section 102 and the first section 101, and the first direction is parallel to a virtual plane defined by the center axis of the first section 101 and the center axis of the second section 102.

[0093] It is understandable that if the spray rod portion 100 is in the shape of a straight rod as a whole, when the user holds the personal care spray device, the spray rod portion 100 needs to be roughly perpendicular to the tooth surface of the teeth so that the water column 301 can be effectively sprayed on the tooth surface or the gap between the teeth. This means that the user needs to raise his arm when using the personal care spray device so that the personal care spray device is directly in front of the mouth. In this way, the user is prone to fatigue. In this embodiment, the spray rod portion includes a first section 101 and a second section 102, and an angle is formed between the second section 102 and the first section 101. In this way, when the user holds the personal care spray device, the second section 102 can be roughly perpendicular to the tooth surface of the teeth without having to raise the arm. As a result, the arm can be raised to a lower height and fatigue is not easily generated.

[0094] On this basis, the first direction is parallel to the virtual plane defined by the central axis of the first section 101 and the central axis of the second section 102. In this way, the user can quickly adjust the arrangement direction of the water column 301 so that the arrangement direction of the water column 301 is parallel to the height direction of the tooth gap.

[0095] Further, the angle between the first component and the second segment 102 is greater than or equal to 90° and less than 180°.

[0096] In some embodiments, Figure 2 , Figure 8As shown, the inner wall of the second flow channel 210 includes a plane portion 211 and a curved portion 212, and the two ends of the curved portion 212 are respectively connected to the plane portion 211, so that the cross-sectional shape of the second flow channel 210 is in a "D" shape. The plane portions 211 of the two second flow channels 210 are close to each other and parallel to each other. In this embodiment, the cross-sectional shape of the second flow channel 210 is constructed to be in a "D" shape, and the plane portions 211 of the two second flow channels 210 are close to each other, so that the two second flow channels 210 each spray out a water column 301, and at the same time, a thin water film 302 is formed between the two water columns 301, and the water column 301 rinses the gap between the teeth, and the water film 302 cleans the gap between the teeth. Through the cooperation of the water column 301 and the water film 302, the overall cleaning effect can be improved.

[0097] It can be understood that when the cross-sectional shape of the second flow channel 210 is "D"-shaped, the cross-sectional shape of the second flow channel 210 is composed of straight lines and arcs, wherein the radius corresponding to the arc is denoted as R, and the length of the arc can be greater than πR, that is, the length of the arc portion is greater than half a circle, so that the water column 301 ejected from the second flow channel 210 can have a more stable shape.

[0098] Further, the distance L0 between the plane portions 211 of the two second flow channels 210 is greater than or equal to 0.2 mm and less than or equal to 2 mm. For example, the distance L0 may be 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, etc.

[0099] The smaller the distance L0 between the plane portions 211 of the two second flow channels 210, the more stable the water film 302 formed between the two water columns 301, and accordingly, the stronger the cleaning ability of the water film 302. However, if the distance L0 is too small, it will affect the overall flushing area of ​​the nozzle 10. Therefore, the distance L0 between the plane portions 211 of the two second flow channels 210 should be greater than or equal to 0.2 mm. In addition, the distance L0 between the plane portions 211 of the two second flow channels 210 cannot be too large, otherwise the water columns 301 will be too divergent, so that the distance between the two water columns 301 exceeds the height of the tooth gap, which will cause the two water columns 301 to fail to fall on the tooth gap at the same time, making one of the water columns unable to be used. Therefore, the distance L0 must be less than or equal to 2 mm. In this way, it is conducive to forming a stable water film 302, and will not affect the overall flushing area of ​​the nozzle 10. In addition, it can also ensure that the two water columns 301 can act on the tooth gap at the same time.

[0100] Further, the radius R0 of the arc surface portion 212 is greater than or equal to 0.2 mm and less than or equal to 0.7 mm. For example, the radius R0 may be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0101] If the radius R0 of the arc surface 212 is too small, the water column 301 sprayed from the second flow channel 210 will be thinner and faster, which will not only easily make the user feel uncomfortable, but also reduce the flushing area. If the radius R0 of the arc surface 212 is too large, the water column 301 sprayed from the second flow channel 210 will be too divergent and slow, which will lead to a decrease in the cleaning effect. After a large number of tests and verifications, it was found that when the radius R0 of the arc surface 212 is greater than or equal to 0.2mm and less than or equal to 0.7mm, the water column 301 can be made moderately fast and the concentration of the water flow is also moderate, which can take into account both the user's comfort and the cleaning effect.

[0102] In some embodiments, the maximum distance L1 between the arcuate portions 212 of the two second flow channels 210 satisfies:

[0103] L1≥L0+2*R0;

[0104] Wherein, L0 is the distance between the planar portions 211 of the two second flow channels 210 , and R0 is the radius of the arc surface portion 212 .

[0105] It is understandable that when the cross-sectional shape of the second flow channel 210 is a semicircle, the maximum distance L1 between the arc surface portions 212 of the two second flow channels 210 is just equal to L0+2*R0; that is, when the above conditions are met, the cross-sectional shape of the second flow channel 210 needs to be a large half of a circle. Such a setting is conducive to making the water column 301 sprayed from the second flow channel 210 have a stable shape, thereby maintaining a good flushing ability.

[0106] In some embodiments, Figure 3 , Figure 4 , Figure 5 as well as Figure 6 As shown, the first flow channel 110 includes a first subsection 111 and a second subsection 112 which are connected to each other, and the second subsection 112 is located between the first subsection 111 and the second flow channel 210, wherein the first subsection 111 is a straight section and the second subsection 112 is a tapered section. In this embodiment, the second subsection 112 is constructed as a tapered section, so that the water flow can be accelerated when flowing through the second subsection 112, and the accelerated water flow is ejected through the second flow channel 210, so that the water column 301 has a better flushing force, which is conducive to ensuring the flushing effect.

[0107] In some embodiments, the cone angle of the second subsection 112 is greater than or equal to 15° and less than or equal to 45°. For example, the cone angle of the second subsection 112 can be 15°, 18°, 20°, 25°, 30°, 35°, 40°, 45°, etc.

[0108] If the cone angle of the second sub-segment 112 is too small, the acceleration effect on the water flow passing through the second sub-segment 112 is not obvious, and it is difficult to ensure the flushing force of the water column 301 sprayed from the second flow channel 210. If the cone angle of the second sub-segment 112 is too large, the accelerated water flow will be faster, and accordingly, the water column 301 sprayed from the second flow channel 210 will also be faster, which can easily make the user feel uncomfortable. After a large number of tests and verifications, when the cone angle of the second sub-segment 112 is greater than or equal to 15° and less than or equal to 45°, the flushing force of the water column 301 sprayed from the second flow channel 210 can be moderate, which will neither cause the problem of insufficient flushing force nor make the user feel uncomfortable due to excessive flushing force.

[0109] In some embodiments, the length of the second sub-segment 112 is greater than or equal to 1 mm and less than or equal to 10 mm. For example, the length of the second sub-segment 112 can be 1 mm, 3 mm, 5 mm, 8 mm, 10 mm, etc.

[0110] It is understandable that the length of the second sub-segment 112 should not be too large or too small. If it is too large, the cone angle will be too small, which will make it difficult to ensure the flushing force of the water column 301 ejected from the second flow channel 210. If it is too small, it will be difficult to ensure the manufacturing accuracy of the second sub-segment 112, which may lead to a decrease in the control accuracy of the flushing force of the water column 301. Therefore, the length of the second sub-segment 112 needs to be greater than or equal to 1mm and less than or equal to 10mm, so that the flushing force of the water column 301 can be within the expected appropriate range and the control accuracy of the flushing force of the water column 301 can be improved.

[0111] In some embodiments, the material of the spray head 200 is soft rubber. Since the soft rubber is easy to deform, the shape of the spray head 200 will change under the action of the water flow, and the spray direction of the water column 301 will also change.

[0112] In some embodiments, Figure 7 As shown, a connecting cavity 220 is provided between adjacent second flow channels 210 so that adjacent second flow channels 210 are connected to each other in the first direction. The size of the connecting cavity 220 along the second direction is smaller than the size of the second flow channel 210 along the second direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to the central axis of the nozzle head 200.

[0113] In this embodiment, a connecting cavity 220 is provided between adjacent second flow channels 210, so that the adjacent second flow channels 210 are connected to each other along the first direction. In this way, when two second flow channels 210 each spray a water column 301, a stable water film 302 is formed between the two water columns 301. The water column 301 can rinse the gap between teeth, and the water film 302 can clean the gap between teeth. Through the cooperation of the water column 301 and the water film 302, the overall cleaning effect can be improved.

[0114] In addition, the water film 302 formed by providing the connecting cavity 220 between the two second flow channels 210 can be relatively thicker, and the water film 302 is also more stable and less likely to break.

[0115] Furthermore, the inner wall surface of the second flow channel 210 is an arc surface, so that the cross-sectional shape of the second flow channel 210 is a "D" shape. This is conducive to forming a stable water column 301 for the water sprayed from the second flow channel 210, and forming a stable water film 302 between two adjacent water columns 301.

[0116] Furthermore, the length of the connecting cavity 220 along the second direction is less than 2 times the radius of the arc surface. This arrangement ensures that the thickness of the water film 302 is significantly smaller than the diameter of the water column 301, that is, it prevents the water flow from gathering too much at the water film 302, thereby ensuring that the water column 301 has a good flushing force, while the water film 302 only provides an auxiliary cleaning effect.

[0117] In some embodiments, the length of the communication cavity 220 along the first direction is greater than or equal to 0.2 mm and less than or equal to 2 mm. For example, the length of the communication cavity 220 along the first direction can be 0.2 mm, 0.5 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, etc.

[0118] The shorter the length of the connecting cavity 220 along the first direction, the more the water column 301 and the water film 302 are formed, which is conducive to improving the cleaning effect. However, the above length should not be too small, otherwise it will cause the water column 301 to converge together, thereby affecting the overall flushing area of ​​the nozzle 10. In this embodiment, the length of the connecting cavity 220 along the first direction is in the range of 0.2mm to 2mm, which can obtain a better cleaning effect without affecting the overall flushing area of ​​the nozzle 10.

[0119] The embodiment of the second aspect of the present application provides a personal care spray device, which includes a main unit and a nozzle 10 in any of the above embodiments, wherein the end of the spray rod portion 100 away from the spray head portion 200 is connected to the main unit. The personal care spray device can be a device capable of spraying water, such as a water flosser and a nasal washer. A water flosser is a tool for cleaning the oral cavity. When the water flosser is working, it can spray a water column 301, which can be used to rinse the tooth surface and the gaps between teeth. A nasal washer is a tool for rinsing the nasal cavity. When the nasal washer is working, it can spray clean water or saline, which can be used to rinse the nasal cavity to remove dirt in the nasal cavity.

[0120] The following uses a water flosser as an example to illustrate the beneficial effects of a personal care spray device:

[0121] In the personal care spray device in the embodiment of the present application, the nozzle 10 of the nozzle 200 is provided with at least two second flow channels 210. Since each second flow channel 210 can construct a water column 301, the nozzle 10 can spray multiple water columns 301 at the same time. When the user rinses the gap between teeth, at least two water columns 301 can be used to rinse the same gap between teeth at the same time. Although the rinsing area of ​​each water column 301 is limited, multiple water columns 301 are sprayed at the same time, which significantly improves the rinsing area of ​​the entire nozzle 10. In this way, the user does not need to move the personal care spray device when rinsing, or can move the personal care spray device slightly. In other words, the user can save or reduce the time spent on moving the care spray device, thereby improving the rinsing efficiency of the personal care spray device.

[0122] In addition, the nozzle head 200 is provided with at least two second flow channels 210, so that the nozzle 10 can spray out multiple water columns 301 at the same time. Compared with the method in the prior art that the nozzle 10 only sprays out one water column 301, the water pressure can be dispersed, so that the impact force of each water column 301 is appropriately weakened. In this way, it is possible to avoid the discomfort of the user caused by excessive impact force of the water column 301 during flushing, and to avoid damaging the user's gums during flushing.

[0123] Furthermore, the host may include a water tank for storing water or cleaning liquid, so that the personal care spray device can continuously spray water or cleaning liquid for a period of time when working. After the water or cleaning liquid in the water tank is used up, water or cleaning liquid can be refilled.

[0124] The host may also include a liquid pump and a control device. The liquid inlet of the liquid pump may be connected to the water tank directly or through a pipeline, and the liquid outlet of the liquid pump may be connected to the nozzle 10 directly or through a pipeline. In this way, when the liquid pump is working, it can suck the liquid in the water tank and transport the liquid to the nozzle 10. After the liquid is sprayed out through the nozzle 10, it forms a water column 301 that can be used for flushing.

[0125] The control device can be electrically connected to the liquid pump to control the start and stop of the liquid pump and the operating power of the liquid pump. For example, the control device can control the liquid pump to start when receiving a flushing instruction, and can control the liquid pump to stop working when receiving a shutdown instruction. In addition, the control device can also control the liquid pump to run at different powers according to a strong flushing instruction, a soft flushing instruction, etc., so as to achieve the purpose of adjusting the flushing force.

[0126] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A nozzle, characterized in that: include: A spray bar portion, wherein a first flow channel is disposed inside the spray bar portion; as well as A nozzle head, the nozzle head is connected to the spray bar, the nozzle head is provided with a second flow channel, and the second flow channel is communicated with the first flow channel; There are at least two second flow channels, and the cross-sectional area of ​​the second flow channels is smaller than the cross-sectional area of ​​the first flow channels.

2. The nozzle according to claim 1, characterized in that The length of the second flow channel is greater than or equal to 0.1 mm and less than or equal to 3 mm.

3. The nozzle according to claim 1, characterized in that At least two of all the second flow channels are symmetrically arranged.

4. The nozzle according to claim 1, characterized in that At least two of all of the second flow channels have unequal lengths.

5. The nozzle according to claim 1, characterized in that The cross-sectional areas of at least two of all the second flow channels are unequal.

6. The nozzle according to claim 1, characterized in that The extension direction of the second flow channel is arranged at an angle to the central axis of the nozzle head.

7. The nozzle according to claim 6, characterized in that A distance between an end of the second flow channel away from the first flow channel and the central axis is smaller than a distance between an end of the second flow channel close to the first flow channel and the central axis.

8. The nozzle according to claim 7, characterized in that The extension lines of at least two of the second flow channels intersect at a first position; A distance between an end of the second flow channel away from the first flow channel and the first position in the extending direction of the central axis is greater than or equal to 0.1 mm and less than or equal to 10 mm.

9. The nozzle according to claim 6, characterized in that A distance between an end of the second flow channel away from the first flow channel and the central axis is greater than a distance between an end of the second flow channel close to the first flow channel and the central axis.

10. The nozzle according to any one of claims 6 to 9, characterized in that An extension direction of one of the second flow channels forms a first angle with the central axis of the nozzle head, and an extension direction of another of the second flow channels forms a second angle with the central axis of the nozzle head. The first angle is not equal to the second angle.

11. The nozzle according to claim 1, characterized in that All of the second flow channels are arranged at intervals along a first direction, and the first direction is perpendicular to the central axis of the nozzle head.

12. The nozzle according to claim 11, characterized in that The first direction is parallel to the length direction of the nozzle head; Alternatively, the boom portion includes a first section and a second section connected to each other, an angle is formed between the second section and the first section, and the first direction is parallel to a virtual plane defined by a central axis of the first section and a central axis of the second section.

13. The nozzle according to claim 1, characterized in that The inner wall of the second flow channel includes a plane portion and a curved portion, and both ends of the curved portion are respectively connected to the plane portion, so that the cross-sectional shape of the second flow channel is "D"-shaped; The planar portions of two of the second flow channels are close to each other and parallel to each other.

14. The nozzle according to claim 13, characterized in that A distance L0 between the planar portions of the two second flow channels is greater than or equal to 0.2 mm and less than or equal to 2 mm.

15. The nozzle according to claim 13, characterized in that The radius R0 of the arc surface portion is greater than or equal to 0.2 mm and less than or equal to 0.7 mm.

16. The nozzle according to claim 13, characterized in that The maximum distance L1 between the arcuate portions of the two second flow channels satisfies: L1≥L0+2*R0; Wherein, L0 is the distance between the two planar portions of the second flow channels, and R0 is the radius of the arc portion.

17. The nozzle according to claim 1, characterized in that The first flow channel comprises a first sub-segment and a second sub-segment which are interconnected, and the second sub-segment is located between the first sub-segment and the second flow channel; The first subsection is a straight section, and the second subsection is a tapered section.

18. The nozzle according to claim 17, characterized in that The cone angle of the second subsection is greater than or equal to 15° and less than or equal to 45°; And / or, the length of the second subsegment is greater than or equal to 1 mm and less than or equal to 10 mm.

19. The nozzle according to claim 1, characterized in that The material of the nozzle head is soft rubber.

20. The nozzle according to claim 1, characterized in that A communication cavity is provided between adjacent second flow channels, so that adjacent second flow channels are connected to each other in the first direction; The size of the communication cavity along the second direction is smaller than the size of the second flow channel along the second direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to the central axis of the spray head.

21. The nozzle according to claim 20, characterized in that The inner wall surface of the second flow channel is an arc surface, so that the cross-sectional shape of the second flow channel is a "D" shape.

22. The nozzle according to claim 21, characterized in that The length of the communication cavity along the second direction is less than twice the radius of the arc surface.

23. The nozzle according to claim 21, characterized in that The length of the communication cavity along the first direction is greater than or equal to 0.2 mm and less than or equal to 2 mm.

24. A personal care spray device, characterized in that: include: Host; as well as The nozzle according to any one of claims 1 to 23, wherein one end of the spray bar portion away from the spray head portion is connected to the main machine.

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